README.md

ZeroToBlockchain Chapter 12: Creating, monitoring and consuming events

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In this chapter, we will update the code from Chapter 11 to include event creation and monitoring on the server and event subscription and notification in the browser.

Chapter 12
  ↳ controller
     ↳restapi
       router.js
        ↳features
           ↳composer
             autoLoad.js
             hlcAdmin.js
             hlcClient.js          <== Updated
             queryBlockChain.js
             Z2B_Services.js       <== Updated
             Z2B_Utilities.js
           ↳ text
               multi-lingual.js
               resources.js
  ↳ HTML
    index.html
    admin.html
    buyer.html                     <== Updated
    ceateConnectionProfile.html
    createMember.html
    createOrder.html
    deleteConnectionProfile.html
    financeCo.html                 <== Updated
    getMemberSecret.html
    removeMember.html
    provider.html                  <== Updated
    seller.html                    <== Updated
    shipper.html                   <== Updated
    singleUX.html
     ↳CSS
       pageStyles.css
     ↳js
       z2b-admin.js
       z2b-buyer.js                <== Updated
       z2b-events.js               <== Updated
       z2b-financeCo.js            <== Updated
       z2b-initiate.js
       z2b-provider.js             <== Updated
       z2b-seller.js               <== Updated
       z2b-shipper.js              <== Updated
       z2b-utilities.js
  ↳ network
   permissions.acl
   queries.qry
    ↳lib
      sample.js                    <== Updated
    ↳models
      base.cto
      events.cto
      sample.cto                   <== Updated

No new files are created. Fifteen existing files are updated:

Files used in this chapter

Web Server Code Unique to this Chapter

• hlcClient.jss
  • add event monitoring to client routines
  • add event notification to browser via web socket.
    • it should be noted that this is a rough implementation for notifying the user of asynchronous events and is appropriate for a lightweight demo but inappropriate for a PoC or a production system.

Defining the business network

• /models/sample.CTO
  • add events to sample.CTO file
• /lib/sample.js
  • add event notification to transactions

Web Browser Code

• all UX files
  • Add placeholder for notification icon and add placeholder for notification counter.
• all UX javascript files
  • use subscribe, unsubscribe and notifyMe routines
• z2b-events.js
  • add event support for alert subscription, notification
• CSS/pageStyles.css
  • add support for notification icon and text